The paper presents an improved adaptive interference cancellation algorithm filtering nonstationary random signal.The complex electromagnetic radiation signal is decomposed to some signals with different frequency by the Empirical Mode Decomposition(EMD) method.An improved least mean square(LMS) algorithm is applied to the adaptive interference cancellation.Computer simulation and experimental results show that the method has better noise cancellation capability than the traditional adaptive noise cancellation.At the same time

the adaptive interference cancellation improves the speed and precision of electromagnetic radiation measurement.So it can be introduced to the engineering application.